Big 5 lug to small 5 lug conversion....................... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

OldJimmy57 · 02-28-2005, 10:57 PM

Need some help guys. I have a 78 suburban with a 12 inch rotor and the big 5 lug bolt pattern. Now what I need is a rotor that will fit the suburbans spindle but that will have the small 5 lug pattern. Any of you guys ever done this before?

SCOTI · 03-01-2005, 12:24 AM

You might research a 1LE rotor from a camaro (IROC). They were 12" diameter & had the smaller 5x4.75 bolt pattern. You should be able to look up what wheel bearings they need & compare them to the truck P/N's.

**crossy** · 03-01-2005, 12:30 AM

the light, 1/2 ton, stripper type full size vans from the same era had the car bolt pattern, 5on4-3/4 , so the answer may be NEW in the parts stores if you find someone behind the counter who hasa little patience. DAVE

RockHQ · 03-01-2005, 01:06 PM

The 1LE camaro (88-92) brake disc will come with metric studs pressed in, but with the right bolt pattern (5x4.75"). The bearings 1LE rotors use are standard A3 and A6, which also fit B-body station wagons with 12" rotors, some early Mopar A-bodies with the "big" bolt pattern and a slew of other cars i've forgot.

02-28-2005, 10:57 PM	#1
OldJimmy57 Registered User Join Date: Jun 2004 Location: mesquite texas Posts: 143	Big 5 lug to small 5 lug conversion....................... Need some help guys. I have a 78 suburban with a 12 inch rotor and the big 5 lug bolt pattern. Now what I need is a rotor that will fit the suburbans spindle but that will have the small 5 lug pattern. Any of you guys ever done this before?

03-01-2005, 12:24 AM	#2
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,068	You might research a 1LE rotor from a camaro (IROC). They were 12" diameter & had the smaller 5x4.75 bolt pattern. You should be able to look up what wheel bearings they need & compare them to the truck P/N's. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

03-01-2005, 12:30 AM	#3
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	the light, 1/2 ton, stripper type full size vans from the same era had the car bolt pattern, 5on4-3/4 , so the answer may be NEW in the parts stores if you find someone behind the counter who hasa little patience. DAVE __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.

03-01-2005, 01:06 PM	#4
RockHQ ROCKET POWER! Join Date: Feb 2003 Location: Finland, Europe Posts: 509	The 1LE camaro (88-92) brake disc will come with metric studs pressed in, but with the right bolt pattern (5x4.75"). The bearings 1LE rotors use are standard A3 and A6, which also fit B-body station wagons with 12" rotors, some early Mopar A-bodies with the "big" bolt pattern and a slew of other cars i've forgot. __________________ What did i do last nite? I had a wonderful time, That's what they tell me What did i do last nite? 1979 C-10 shortfleet: Olds 350, Th400, 12 bolt Current project: 1969 Olds 455 W-30, needing a rebuild

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